HUNTSVILLE, Alabama -- Employees of the UPS distribution center at 113 Winchester Road have been given the "all clear"to return to work following an evacuation that began just after 8 a.m. today. Police said a potentially hazardous box, which was reportedly fuming while being processed, contained hydrogen peroxide.

View full sizeHazmat crews check out a suspicious package found at the UPS distribution center at 113 Winchester Road this morning, Friday, April 26, 2013. (Nicole Emmett/nemmett@al.comHVT

Huntsville police received the call at 8:10 a.m. about a package that was leaking potentially hazardous material, spokesperson Harry Hobbs said.

Two employees did come in contact with the package and had liquid which leaked on their hands, Hobbs said. They were treated on the scene and have not been transported for injuries at this time.

Police processed the box for about an hour before giving the green light to re-enter the building.

"We are trying to be careful and cautious," he said, adding that recent situations involving packages in our country have law enforcement on heightened alert.

Huntsville police, HEMSI, Huntsville Fire & Rescue and Hazmat crews were all at the scene.

Employees on the scene said Friday is the distribution center's busiest day of the week. Two men who have worked at the location for 20 and 22 years said this has never happened.

Updated at 9:45 a.m. to include details from the scene.Updated at 10:30 a.m. when evacuation ended.